Masami's comment is a reasonably good answer.
Your sentences are not correct, as there is something missing. You need some sort of verb phrase after 'as she'. The form should be something like "Someone did something as they did something else."
Her first two examples are not quite right though, as they need another 'as' before 'tightly'.
Another one is: Annette grasped the racket tightly as she walked onto the tennis court